feat(ultraplan-local): v1.6.0 — /ultraresearch-local deep research command

Add /ultraresearch-local for structured research combining local codebase
analysis with external knowledge via parallel agent swarms. Produces research
briefs with triangulation, confidence ratings, and source quality assessment.

New command: /ultraresearch-local with modes --quick, --local, --external, --fg.
New agents: research-orchestrator (opus), docs-researcher, community-researcher,
security-researcher, contrarian-researcher, gemini-bridge (all sonnet).
New template: research-brief-template.md.

Integration: --research flag in /ultraplan-local accepts pre-built research
briefs (up to 3), enriches the interview and exploration phases. Planning
orchestrator cross-references brief findings during synthesis.

Design principle: Context Engineering — right information to right agent at
right time. Research briefs are structured artifacts in the pipeline:
ultraresearch → brief → ultraplan --research → plan → ultraexecute.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hooks/prompts/voice-guardian.md

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+VOICE GUARDIAN — DRIFT SCORING & AI AUTHENTICITY CHECK: If the file being written/edited is LinkedIn content (post draft, article, or content file — NOT config, state, scripts, docs), perform both AI detection and voice drift scoring:
+
+## 1. AI Pattern Detection
+
+Scan for these common AI writing patterns:
+- Generic openings: 'In today's rapidly evolving...', 'As we navigate...', 'In the ever-changing landscape...'
+- Filler phrases: 'It's worth noting that', 'It goes without saying', 'At the end of the day'
+- Overused transitions: 'Furthermore', 'Moreover', 'Additionally', 'In conclusion'
+- AI superlatives: 'game-changing', 'revolutionary', 'transformative', 'groundbreaking'
+- List padding: Adding obvious points just to fill a list
+- Hedging language: 'It could be argued', 'One might say', 'Perhaps'
+- Perfect structure: Every paragraph exactly the same length
+
+If 3+ AI patterns detected, flag: 'Voice Guardian Alert: This content scores below authenticity threshold. AI patterns found: [list specific patterns]. Suggested fixes: [specific rewrites using natural language].'
+
+## 2. Six-Dimension Voice Drift Scoring
+
+Read the voice profile and collected post samples from `${CLAUDE_PLUGIN_ROOT}/assets/voice-samples/authentic-voice-samples.md`.
+
+Score the draft against these 6 dimensions (0 = perfect match, 1 = minor drift per dimension):
+
+| Dimension | What to Compare |
+|-----------|----------------|
+| **Sentence structure** | Average length, complexity, use of fragments vs. compound sentences |
+| **Word choice** | Vocabulary level, preferred/avoided words from voice profile |
+| **Opening patterns** | Hook style — does it match the user's signature openers? |
+| **Storytelling** | Anecdote usage, narrative arc, concrete vs. abstract |
+| **Tone markers** | Humor, directness, formality level, empathy signals |
+| **Formatting** | Paragraph length, whitespace, emoji usage, punctuation habits |
+
+**Sum the 6 scores (0-6 total) and output a verdict:**
+
+| Score | Verdict | Action |
+|-------|---------|--------|
+| 0-1 | AUTHENTIC | No changes needed |
+| 2-3 | CAUTION | Flag specific dimensions that drifted, suggest fixes |
+| 4-5 | ALERT | Significant drift — list all deviating dimensions with rewrites |
+| 6 | REWRITE | Content doesn't sound like the user — recommend starting over |
+
+**Confidence gate:** If `## Collected Post Samples` has fewer than 5 posts, output: "Voice drift: LOW CONFIDENCE (X/5 samples). Scoring based on voice profile only." and score only against the profile description (dimensions 1-2 and 4-6), skipping opening patterns (dimension 3) which needs real samples.
+
+**Output format (always include at end of system message):**
+```
+Voice Drift: [VERDICT] ([score]/6) [confidence: HIGH/LOW]
+[If CAUTION+: list dimensions that scored 1 with brief fix suggestion]
+```
+
+## 3. Humanization Tips (for CAUTION or higher)
+
+- Add specific personal anecdotes or observations
+- Use conversational contractions (I've, don't, it's)
+- Include imperfect/real-world examples
+- Vary paragraph and sentence length naturally
+- Reference specific people, tools, or experiences
+
+**Skip this check** if the file is config, state (.local.md), script, hook, JSON, or documentation.